Augustine Washington (father; deceased)
George Washington (February 22, 1732 - December 14, 1799) was the first president of The United States. He came to be known as the "father of the country," both during his lifetime and to this day.
In "Vestigial Peter", When Peter tries to talk Chip out of a day of adventure because it would be tiring for him, he insists he is just being honest like George Washington. A cutaway shows young George owning up to chopping down a cherry tree, but effeminately disavows any knowledge of a pamphlet on "The Boston He Party" his father finds under his bed. George is voiced by Seth Green in this appearance.
In "Stewie, Chris & Brian's Excellent Adventure", Stewie, Chris, and Brian travel back in time and George Washington is observed crossing the Delaware with water wings due to being terrified of the water.
During the song "Patriotic Weirdness" in "Peter's Sister", Jack Skellington and the citizens of Halloween Town take over the 4th of July, celebrating with the skeletons of George Washington, Abraham Lincoln and Franklin Delano Roosevelt.
Brian pursues a scam in "The New Adventures of Old Tom", comparing it to Theodore Roosevelt being on Mount Rushmore without having participated in a major event compared to the others.
In "Trump Guy", when Donald Trump tries to defend his sexual proclivities of grabbing Meg by the pussy, he notes that every other President has done the same, leading to a portrait of George planning sex with Martha Washington.